Following the release of iTunes 11.1.6 and OS X 10.9.3 betas to developers and AppleCare employees earlier this month, Apple on Friday seeded another OS X 10.9.3 beta to developers.

Now available in Dev Center for registered Mac developers, a new version (build 13D28) of what would become Apple’s third major software update to its desktop operating system focuses on further refinements to Graphics Drivers, Safari, Audio and Contacts and Calendar sync over USB in iTunes…

The new build can be downloaded using the Software Update tab in the Mac App Store or from the Mac section of Apple’s Dev Center portal for developers.

Mavericks has inexplicably removed the ability to sync contacts and calendar items in iTunes over a USB cable, much to the dismay of users.

Fortunately, a forthcoming iTunes 11.1.6 update, a beta of which was seeded to developers earlier this month, “restores the ability to sync contacts and calendar info from your Mac,” as per release notes.